Confined Spaces

A confined space is usually small and difficult to get into and out of. As such, the normal hazards of welding are intensified when carried out in confined spaces. Asphyxiation is the main danger and the most common cause of death in confined spaces. A formal 'safe system of work' should be followed at all times.

Many of the everyday hazards encountered in welding can be exacerbated if the work is being carried out in a confined space. A significant number of deaths involving people working in confined spaces occur each year, with asphyxiation being a major cause of those deaths, so extra vigilance is needed.

One dictionary definition of 'confined' is 'imprisoned', and a confined space is one where the means of entry and exit are restricted. The space itself does not have to be small and cramped, but if it is then there is likely to be restricted ventilation, which can allow the build up of a hazardous atmosphere. Then it may be described as 'confined'. An example of confined spaces would be a storage tank, it may also contain, or have contained, toxic, flammable or hazardous substance, vapour or gas.

So it is clear that working in such spaces requires a greater awareness of potential hazards and safe working practices than normal.

Welders working in enclosed spaces must be properly trained, equipped and supervised. Additional protective and monitoring equipment over and above that normally necessary may be required when welding in a confined space. It is also recommended that a formal 'safe system of work' should be followed at all times.